Error codes P0141 and P0420

[bnichols19]

Car keeps dying while driving doesn't matter if I'm running 75 on interstate or stopped in a driveway. It died when it chooses too, and starts the same. Sometimes it will crank and start right back up other times it will crank until I run the battery dead and have to get a jump.
I no nothing about cars and need help. please and thank you

 

[MelsRegal]

Duplicate post

Thread 'Error codes P0141 and P0420'

Nov 12, 2025

Car keeps dying while driving doesn't matter if I'm running 75 on interstate or stopped in a driveway. It died when it chooses too, and starts the same. Sometimes it will crank and start right back up other times it will crank until I run the battery dead and have to get a jump.
I no nothing about cars and need help. please and thank you

• bnichols19
• Replies: 16
• Forum: Buick LeSabre Forum